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Microchip Technology JANTX1N4620-1/TR
- Part No.:
- JANTX1N4620-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JANTX1N4620-1/TR.pdf
- Description:
- DIODE ZENER 3.3V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:3,426
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Product details
Overview
JANTX1N4620-1/TR from Microsemi is a 500 mW, 3.3 V ±5% metallurgically bonded glass Zener diode in DO-35 package, qualified to MIL-PRF-19500/435 JANTX level for high-reliability voltage regulation. It delivers 250 mA Zener test current, 1650 Ω dynamic impedance at IZT, and 3.5 µA max reverse leakage at 2.64 V.
For engineers reviewing the JANTX1N4620-1/TR datasheet, JANTX1N4620-1/TR pinout, JANTX1N4620-1/TR application, or JANTX1N4620-1/TR equivalent, key selection criteria include military-grade reliability qualification, low-noise operation (1 µV/√Hz), thermal resistance of 250 °C/W (junction-to-lead), and axial-leaded DO-35 mechanical compatibility with legacy through-hole designs.
Technical Context
This device operates as a precision shunt voltage regulator in reverse-biased breakdown mode, with cathode band marking polarity. Its metallurgical bond construction ensures stable Zener voltage under thermal cycling and radiation exposure per MicroNote 050.
The JANTX1N4620-1/TR exhibits a temperature coefficient of –0.075 %/°C and supports linear power derating from 500 mW at 25 °C to zero at 175 °C ambient, with junction-to-lead thermal resistance optimized for 3/8″ lead length mounting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 3.3 V ±5% at 250 mA test current - sets precise reference point for analog sensing and biasing circuits |
| Power Dissipation | 500 mW at 25 °C - supports stable regulation in compact, unheatsinked PCB layouts |
| Dynamic Impedance ZZT | 1650 Ω at 250 mA - determines output voltage stability under load transients |
| Reverse Leakage IR | 3.5 µA max at 2.64 V - ensures minimal quiescent current in low-power standby modes |
| Noise Density ND | 1 µV/√Hz - enables use in low-noise reference paths for precision ADCs and instrumentation |
| Temp Coefficient αVZ | –0.075 %/°C - provides predictable voltage drift over industrial temperature range (–65 to +175 °C) |
| Thermal Resistance RθJL | 250 °C/W @ 3/8″ lead length - defines safe operating area when mounted per MIL-STD-202 |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed axial-leaded glass package; cathode identified by single black band; leads tin-lead plated and solderable per MIL-STD-750 method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node during regulation; carries full Zener current |
| Cathode | Zener regulation output / voltage reference node | Banded end; supplies regulated 3.3 V to load; must be held at higher potential than anode |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 JANTX qualification | Validated for aerospace and defense systems requiring extended temperature operation and radiation hardness |
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal shock and mechanical vibration |
| Low noise density (1 µV/√Hz) | Enables direct use in high-resolution analog front-ends without external filtering |
| Hermetic glass sealing | Prevents moisture ingress and long-term parameter drift in humid or corrosive environments |
| Non-ESD-sensitive design | Withstands handling without protection circuitry per MIL-STD-750 method 1020 |
Applications
| Avionics Power Monitoring | Spacecraft Sensor Biasing |
|---|---|
Use Scenario: Regulating reference voltage for analog-to-digital converters measuring aircraft bus voltage. IC Role / Device Role / Timing Role: Shunt Zener reference providing stable 3.3 V input to ADC driver stage. Use Value: JANTX1N4620-1/TR's –0.075 %/°C tempco and MIL-qualified reliability ensure <±0.5% reference error across –55 to +125 °C flight envelope. | Use Scenario: Supplying bias voltage to radiation-hardened photodiode amplifiers on satellite star trackers. IC Role / Device Role / Timing Role: Low-noise voltage reference source for op-amp feedback networks. Use Value: JANTX1N4620-1/TR's 1 µV/√Hz noise density prevents signal degradation in sub-picoamp photocurrent measurements. |
| Ground Vehicle Control Units | Nuclear Instrumentation Systems |
Use Scenario: Stabilizing microcontroller I/O reference in engine control modules exposed to under-hood thermal cycling. IC Role / Device Role / Timing Role: Primary voltage clamp protecting 3.3 V logic rails from transient overvoltage. Use Value: JANTX1N4620-1/TR's 250 °C/W junction-to-lead thermal resistance allows reliable operation at 125 °C ambient with standard lead-forming. | Use Scenario: Establishing calibration reference in neutron flux monitoring electronics deployed in reactor containment zones. IC Role / Device Role / Timing Role: Radiation-tolerant Zener element in precision voltage divider networks. Use Value: JANTX1N4620-1/TR's inherent radiation hardness (per MicroNote 050) maintains VZ stability after 100 krad(Si) total ionizing dose exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4620US-1 | Same electrical specs but in DO-213AA surface-mount package; no axial leads | Requires SMT reflow process; unsuitable for through-hole prototyping or repair | Select when board space constraints mandate surface-mount and thermal pad layout supports 250 °C/W RθJL |
| JAN1N4620-1 | Identical DO-35 package and electrical parameters; qualified only to JAN level (not JANTX) | Lacks extended screening for burn-in and life testing required in mission-critical avionics | Select only for cost-sensitive commercial or non-safety-critical industrial use where full JANTX screening is unnecessary |
Compared with JANTX1N4620-1/TR, the 1N4620US-1 offers identical regulation performance in a space-saving SMT form factor, while the JAN1N4620-1 reduces procurement cost but omits the accelerated life testing and lot acceptance requirements mandated for JANTX-level deployment.
Availability
JANTX1N4620-1/TR is available at Aetrix Electronics and suitable for avionics power monitoring, spacecraft sensor biasing, and nuclear instrumentation systems requiring stable component supply across extended temperature and radiation environments.
Supply support for JANTX1N4620-1/TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microsemi Corporation (now part of Microchip Technology) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The 1N46xx-1 series was developed specifically to meet MIL-PRF-19500/435 requirements for ruggedized, low-noise Zener references in safety-critical systems where long-term parametric stability is mandatory.
FAQ
What is the Zener voltage tolerance of JANTX1N4620-1/TR?
JANTX1N4620-1/TR has a nominal Zener voltage of 3.3 V with a ±5% tolerance, measured at 250 mA test current and 25 °C ambient. This tolerance reflects the standard JEDEC specification for the 1N4620-1 family and is verified per MIL-PRF-19500/435 screening requirements for JANTX-level devices.
Is JANTX1N4620-1/TR RoHS compliant?
No, JANTX1N4620-1/TR is not RoHS compliant. The "e3" RoHS designation applies only to commercial-grade versions (e.g., 1N4620-1e3); military-spec JANTX variants retain tin-lead plating per MIL-STD-750 method 2026 to ensure solderability and reliability under thermal stress.
What is the maximum Zener current rating for JANTX1N4620-1/TR?
JANTX1N4620-1/TR supports a maximum Zener current (IZM) of 85 mA, calculated from its 500 mW power rating and 3.3 V nominal Zener voltage. This value assumes operation at 25 °C lead temperature; current must be reduced linearly above 50 °C per the derating curve in the datasheet.
How is polarity marked on JANTX1N4620-1/TR?
JANTX1N4620-1/TR uses a single black cathode band on the glass body to indicate polarity. During Zener regulation, the banded (cathode) end must be held at a higher potential than the anode end. This marking conforms to JEDEC standard DO-35 package conventions and is verified during MIL-PRF-19500/435 visual inspection.
Does JANTX1N4620-1/TR require external heat sinking?
No, JANTX1N4620-1/TR does not require external heat sinking when operated within its 500 mW rating and mounted with 3/8″ (10 mm) lead length from the body, achieving 250 °C/W junction-to-lead thermal resistance. Its DO-35 glass package relies on lead conduction for thermal dissipation, consistent with MIL-STD-202 test conditions.
JANTX1N4620-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.3 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1650 Ohms
- Current - Reverse Leakage @ Vr:
- 3.5 µA @ 1.5 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/435
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
JANTX1N4620-1/TR FAQ
1.How can I place an order for JANTX1N4620-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4620-1/TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for JANTX1N4620-1/TR reliable?
The price and inventory of JANTX1N4620-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4620-1/TR is usually 5 days.
3.What payment methods are accepted for JANTX1N4620-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTX1N4620-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANTX1N4620-1/TR?
JANTX1N4620-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N4620-1/TR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for JANTX1N4620-1/TR?
For technical support, including JANTX1N4620-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4620-1/TR requirements.
6.How does Aetrix verify that JANTX1N4620-1/TR is sourced from the original manufacturer or authorized distributors?
All JANTX1N4620-1/TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that JANTX1N4620-1/TR meets industry standards.
7.What is the process for return or replacement of JANTX1N4620-1/TR?
All JANTX1N4620-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4620-1/TR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The JANTX1N4620-1/TR part is unused and in its original packaging.
Return procedure for JANTX1N4620-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANTX1N4620-1/TR Tags
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